Bug 158397

Summary:	[JSC] Rename thisValue => receiver and slotBase => holder
Product:	WebKit	Reporter:	Yusuke Suzuki <ysuzuki>
Component:	JavaScriptCore	Assignee:	Yusuke Suzuki <ysuzuki>
Status:	NEW ---
Severity:	Normal
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Yusuke Suzuki 2016-06-05 07:26:59 PDT

Several code misuse thisValue and slotBase, and it sometimes incurs assertion failure.
Let's avoid `this` name. Instead, use |receiver| at least for property lookup.
This name "receiver" is spec-compilant name.